简介：与搏动在magneto-hydro-dynamic泵为充分发达的流动驱动器的稳定性在这糊一个分析解决方案横向的Eletro磁性的领域被介绍。做这，流动的一个理论模型被开发，分析结果被获得因为两个都对合适的圆柱、笛卡儿的配置在海洋的容器的推进使用。管理寓言的动量PDE用近似速度分发被转变成一个平常的微分方程。数字结果被获得，asymptotic分析被造发现答案的数学行为。在为斯图亚特数字，电磁的相互作用数字，雷纳兹数字，方面比率，以及磁性、电的尖频率和阶段角度的移动的各种各样的价值的magneto-hydro-dynamic泵对时间的最大的速度被介绍。结果证明为一个高级斯图亚特数字，为在流动的某个方向的液体流动的稳定性有频率限制。这稳定性频率依赖于一条隧道的几何参数。

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简介：China'smalemarriagesqueezeanditspotentialconsequencehaveattractedmuchattentionandgivenrisetodebate,butmoststudiescontributethissqueezetosexstructureandneglecttheagestructure,andsomestudiesuseflawedmethodtostudythecontributionofagestructureinthissqueeze.InthispaperwedevelopanindicatorofSpousalSexRatio(SSR)andapplyadecompositionmethodintoageandsexstructure.BasedonthedatafromChina's2010censusandprojection,wepredictthatfrom2010to2020,theagestructurewillbethedominantfactorforChina'smalemarriagesqueeze,andfrom2020to2034,thecontributionofsexstructurewillbeincreasing,whereasthatofagestructurewillbedecreasing.From2034to2045,China'smalemarriagesqueezewillmainlyfromimbalancedsexstructure,andtheagestructurewillcontributelittleornegativelytoChina'smalemarriagesqueeze.

简介：Theseismicconceptualdesignisanessentialpartofseismicdesigncodes.Itpointsoutthattheterm'seismicconceptualdesign'shouldimplythreeaspects,i.e.,thegivenconceptitself,thespecificprovisionsrelatedtothegivenconceptandthedesigningfollowingtheprovisions.Seismicconceptualdesigncanbeclassifiedintotwocategories:thestrictortraditionalseismicconceptualdesignandthegeneralizedseismicconceptualdesign.Theauthorsaretryingtodefineforbothconceptualdesignstheirconnotationsandstudytheircharacteristics,inparticular,thedifferencesbetweenthem.Authorsemphasizethatbothconceptualdesignssoundveryclose,however,theirdifferencesareapparent.Thestrictconceptualdesignsareusuallyworkedoutdirectlyfromengineeringpracticeand/orlessonslearntfromearthquakedamage,whilethegeneralizedconceptualdesignsareresultedinaseriesofvisionsaimingtorealizethegeneralobjectivesoftheseismiccodes.Thestrictconceptualdesigns,(traditionalconceptualdesigns)areindispensableelementsofseismiccodesinassuringdesignedstructuressaferandthegeneralizedconceptualdesignsareplayingkeyrolesindirectingtoamoreadvancedandeffectiveseismiccodes.

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简介：Acutepancreatitisduringpregnancyisarareevent,andcanbeassociatedwithhighmaternalmortalityandfetalloss.Gallstonediseaseisthoughttobethemostcommoncausativefactorofacutepancreatitis,but,inmanycases,thecauseremainsunclear.Wereportacaseofa36-year-oldwomanat35wkofgestation,whopresentedwithseverepainconfinedtotheupperabdomenandradiatingtotheback.Thepatientwasdiagnosedwithacuteidiopathicpancreatitis,whichwasmanagedconservatively;sherecoveredwithinseveraldaysandthendeliveredahealthybaby.Thereforeitisimportanttoconsideracutepancreatitiswhenapregnantwomanpresentswithupperabdominalpain,nauseaandvomitinginordertoimprovefetalandmaternaloutcomesforpatientswithacutepancreatitis.

简介：Thispaperexplores,explainsanddiscussesissuesaroundthedilemmabetweenlocalconservationofnaturalresources(often,endangeredspeciesandhabitats)andtourismneedsinAfrica.Oftenandinconstitutionalterms,localpeoplehavearighttoexploitanduseresourcesendowedintheirlocalarea.However,touristsoftenareinterestedinviewingthevegetationandanimalresourcesundisturbed.Inevitably,thereisanundeclaredanimosityofvaluesandinterestsbetweenlocalcommunitiesandtouristsandstateagencies.Asaresult,thedilemmaisthusofgovernance.ThepurposeofthispaperistodemonstratethegovernancedilemmaofresourceutilizationandtourisminAfricainabidtocreateaninformedstewardshipframeworkforsustainability.ThisisachievedbywayofcasestudiesandnarrativesfromAfrica.Assuch,thispaperwillbeareviewliteratureonhowdifferentcommunitiesperceivetourismandderivelivelihoodsfromtheirimmediateenvironment.Italsoexplainshowtheexternalfactorsinfluencelocalneedsandinterests.Amoresustainableandoperationalframeworkthatreducesfrictionamongstakeholdersissuggested.

简介：1.IntroductionThreevillageswereselectedtodothefieldresearchinTibetAutonomousRegion:KhorchakvillageandShideVillageinPurangTown,PurangCounty,andKungyalVillageinHorCounty.ClosetoIndiaand1okmfromNepal,thefirsttwovillages,KhorchakandShide,aresituated18kilometersfromPurangCounty,alongthedownstreamofPeacockRiver,oneofthefourmajorriversinAli.Withaveragealtitudeof3850metersinplateausubfrigidaridclimate,thesetwobeautifulvillagesfallintothecategoryoffarmingpastoralareaandtheirproductivestructureissettled/grazing,herdingsheep,goat,cowandetc.KungyalVillage,115kilometerstotheeastofPurangCountygovernment,altitude467o,plateausubfrigidaridclimate,isatypicalpastoralareaanditsproductivestructureisnomadorseasonalnomad,herdingyak,sheepgoatandetc.Thesethreevillageswerechosenduetotheirrepresentativefeatures.

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简介：Inthispaper,wefirstlyanalyzethe"3,400traveltimetable"usedforalongtimeinXinjiangSeismologicalNetworktoobtainthevelocitystructuremodelsinaccordwiththetablebyfitting.ThenwefitthevelocityofallseismicphasesrecordedinXinjiangregioninJanuary2009~December2013.Simulationanalysisisdoneonthereliabilityandstabilityofthevelocities,andaconceptisproposedforbuildingsubareacrustalvelocitymodelsaccordingtopartitioningofseismicclusterregions.ThecrustalvelocitymodelsuitablefortheYutianareaisfittedwiththedataofallphasesofseismiceventswithinaradiusof1°aroundthe2014YutianM_S7.3earthquakesinceJanuary2009,andthemodelisappliedtotherelocationoftheYutianM_S7.3earthquakeanddeterminationoffocaldepthsoftheearthquakesequence.

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简介：Thespraybehaviorsofthecombinedtrapezoidspraytray(CTST)haveasignificanteffectonthegas-liquidinterface.Inthispaper,thesprayprocessofCTSTinacolumn,570mmindiameter,wasexperimentallyinvestigatedbyusingahigh-speedcamera,andatheoreticalmodeloftheaveragedropletsizewasestablishedaccordingtotheunstablewavetheory.Theresultsdemonstratedthatgasvelocitypassingthroughtheholeisthekeyfactoraffectingthesprayangle,whichincreasesgraduallywithanincreaseinthegasvelocity.Whenthegasvelocityexceeds7.5m/s,thesprayanglebecomesstableataround55°.Theaverageflowvelocityoftheliquidsheetatthespray-holeincreasessignificantlywithanincreaseinthegasvelocity,anddecreasesslightlywithanincreaseintheliquidflowrate;moreover,itincreasesfromthebottomofsprayholeupwardtothetop.ThedensityofliquiddropsdistributioninthesprayareacanbedescribedbytheRosinRammlerfunction.Inaddition,theliquiddropsaremainlyconcentratedintheareaofsprayanglerangingfrom20°to40°,andtheygraduallybecomeuniformwiththeincreaseinthegasvelocityandtheliquidflowrate.Theaverageliquiddropsizedeceaseswithanincreaseinthegasvelocity,andincreasesslightlywithanincreasingliquidflowrate.Inthenormalworkingrange,theaverageliquiddropsizeisabout1.0mmto2.5mmindiameter.

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简介：Sincethesimilarityinsizedistributionofearthquakesandacousticemissions(AE)wasfoundinthe1960s,manylaboratorystudieshavebeenmotivatedbytheneedtoprovidetoolsforthepredictionofminingfailuresandnaturalearthquakes.Thispaperaims,ontheonehand,todrawanoutlineoflaboratoryAEstudiesinthelast50years,whichhaveaddressedseismologicalproblems.TopicsincludethepowerlawsinwhichthesimilaritybetweenAEsandearthquakesisinvolvedandprogressthathasbeenmadeinAEtechnologyandlaboratoryAEstudy.Ontheotherhand,thisstudywillhighlightsomekeyissuesintensivelydiscussed,especiallyinthelastthreedecades,suchasaspectsrelatedtothepre-failuredamageevolution,faultnucleationandgrowthinbrittlerocksanddiscussfactorsgoverningtheseprocesses.

简介：Thearticlemainlydiscussesthenecessityofleading-ininEnglishclassandgivessomeeffectivemethodsofLeadinginonhowtoimprovestudents’learningenthusiasm.

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简介：该文运用图表等形式对近些年来华留学人员的情况进行了总结,发现其数量、地区分布等呈现逐年递增的趋势。通过分析得出,这一状况与我国学术氛围的增强、高等教育的发展进步,以及政府的大力支持有关。同时,通过数据的比较发现,在国际范围内,存在对我国高等教育发展的认识不均衡的现象,这对高校等相关部门提出了新的要求。

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